Abstract: Using copper chloride dihydrate and anhydrous ferric chloride as the main raw materials, p-p heterojunction material Cu₂O/CuFeO₂ catalysts with different raw material ratios were prepared by a one-step hydrothermal method. Their microstructure, phase structure, chemical state, light absorption ability, and electron transport performance were characterized, and their catalytic performance and mechanism of action were investigated for the photocatalytic Fenton reaction in wastewater treatment. The results show that the prepared Cu₂O/CuFeO₂ heterojunction material is a block shaped particle structure containing only Cu₂O and CuFeO₂, with a valence band width of 0.23 eV, which is smaller than that of Cu₂O and CuFeO₂, and has good electron hole separation ability; The Cu₂O/CuFeO₂ catalyst prepared with a molar ratio of copper to iron of 1.2 has the best performance, and the degradation rate of wastewater containing Rhodamine B (RhB) reaches 98% after 15 minutes of degradation; After 5 cycles of using, the photocatalytic degradation rate of RhB still reached 92%; Mechanism studies have found that in the photocatalytic oxidation reaction system of mercury lamp, Cu₂O/CuFeO₂, H₂O₂, and RhB,.OH and h⁺are the main active species.

Key words: copper-iron ore, heterojunction, photo-Fenton reaction, rhodamine B